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Finding the Fourth Proportional to 31,362, 43,315.47 and 20,654.73

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Solution

The fourth proportional to 31,362, 43,315.47 and 20,654.73 is: 28,527.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,362 : 43,315.47 = 20,654.73 : x
  2. Step 2: Convert to fraction form
    31,362/43,315.47 = 20,654.73/x
  3. Step 3: Cross multiply
    31,362x = 43,315.47 × 20,654.73
  4. Step 4: Simplify right side
    31,362x = 894,669,337.67
  5. Step 5: Solve for x
    x = 894,669,337.67/31,362
  6. Step 6: Final answer
    x = 28,527.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.